Sieve for thrashing-machines



(No Model.)

M. F. LBMONNIER. Sieve for Thrashing Machine's.

N 240,152.- Patented April 12,1881.

D Q Q WITNESSES: INVENTOR:

426W 4 S 7 BY ATTORNEYS.

N-PEI'ERS, PHOTO-LITHOGRAFNR WASHINGION. D. c,

UNITED STATES PATENT OFFICE.

MILLARD F. LEMONNIER, OF IDA GROVE, IOWA.

SIEVE FOR THRASHlNG-MACHINES.

SPECIFICATION formingpart of Letters Patent No. 240,152, dated April 12,1881.

Application filed October 27, 1880.

To all whom it may concern Be it known that I, lVIILLARD FILLMORELEMONNIER, of Ida Grove, in the county of Ida and State of Iowa, haveinvented a new and useful Improvementin Sieves for Thrashing-Machines,of which the following is a specification.

Figure 1 is a sectional elevation of a portion of the improvement. Fig.2 is an underside plan view of a portion of the improvement. The objectof this invention is to furnish sieves for thrashing-machines soconstructed as to cause the air-blast from the fan-blower to act moreeffectively to clean the grain than sieves constructed in the ordinarymanner.

The invention consists in constructing a sieve for thrashing-machines ofa board threefourths of an inch (more orless) in thickness, havingholesfrom three-eighths to four-eighths of an inch in diameter formedthrough it, and havinginclined grooves formed in its lower side at thesides of the holes toward the fanblower, whereby the air-blast. will beguided into and deflected through the said holes, as will be hereinafterfully described.

Similar letters of reference indicate corresponding parts.

The sieve is made of a board, A, of the required length and breadth andthree-fourths of an inch thick. The board A is perforated with numerousholes B, from three-eighths to four-eighths of an inch in diameter.

Upon the lower side of the board A, at the (No model.)

sides of the holes B toward the fan-blower, are formed short inclined ortapered grooves O, as shown in Figs. 1 and 2.

With this construction the grooves 0 will act as guide-channels for theair-blast coming from the fan in the direction of the arrows, Fig. 2, sothat a larger amount of air will pass through the holes B than withsieves constructed in the ordinary manner. The thickness of the board Awill cause the blast of air guided into the holes B by the grooves G tobe deflected upward, so as to strike the grain more directly, and thusblow off the chaff and other light impurities more elitectively thanwhen sieves constructed in the ordinary manner are used, so that thegrain will be cleaned fast and thoroughly.

Having thus fully described my invention, 1 claim as new and desire tosecure by Letters Patent A sieve for thrashing-machines,constructedsubstantially as herein shown and described, consistingof aboard, A,having holesB formed through it, and having inclined grooves 0 formed inits lower side, upon the sides of the holes B toward the fan-blower,whereby the air-blast will be guided into and deflected upward throughthe holes B, as set forth.

MILLARD FILLMORE LEMONNIER. WVitnesses:

W. WILLIAMSEN, D. LEMONNIER, D. K. HUNGERFORD.

